Gas-forming agent for cement composition

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 38/02 (2006.01) C04B 22/08 (2006.01) C04B 24/12 (2006.01)

Patent

CA 2612911

A cement composition utilizing said agent offers improved shrinkage compensation, solution: A gas-forming agent for a cement composition containing nitrite comprises a substance which produces nitrogen gas through a reaction in the cement composition.

L'invention concerne l'obtention d'un agent formant du gaz, ne présentant aucune friabilité de l'hydrogène et permettant de produire du gaz de manière à obtenir une quantité suffisante de gonflement, même en présence de nitrite et l'obtention d'une composition de ciment mettant en oeuvre l'agent conférant une compensation de rétrécissement améliorée. L'invention concerne, par conséquent, un agent de formation de gaz destiné à une composition de ciment renferment du nitrite et comprenant une substance produisant un gaz d'azote par le biais d'une réaction dans la composition de ciment.

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